Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D471/00—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00
  • C07D471/12—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00 in which the condensed system contains three hetero rings
  • C07D471/18—Bridged systems
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P31/00—Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
  • A61P31/04—Antibacterial agents
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P35/00—Antineoplastic agents
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D498/00—Heterocyclic compounds containing in the condensed system at least one hetero ring having nitrogen and oxygen atoms as the only ring hetero atoms
  • C07D498/22—Heterocyclic compounds containing in the condensed system at least one hetero ring having nitrogen and oxygen atoms as the only ring hetero atoms in which the condensed system contains four or more hetero rings

Definitions

• This invention relates to a compound represented by the formula (1) wherein R is a hydrogen atom or an alkyl group having 1-5 carbon atoms [hereinafter referred to as compound (I)] and salts thereof, and to a process for preparing the same.
• DX-52-1 a compound wherein R is a hydrogen atom
• its alkyl esters are novel substances prepared by reacting DC-52 or its lower alkyl ester represented by the general formula (II): where R is a hydrogen atom or alkyl group having 1-5 carbon atoms with cyanide ions.
• DX-52-1 its alkyl esters and salts thereof have an antibacterial activity against various bacteria and also an anti-tumor activity and have a significantly improved stability over DC-52.
• the alkyl group represented by R is exemplified by straight or branched alkyls of C 1 -C S such as methyl, ethyl, n-propyl, i-propyl, n-butyl, i-butyl and n-pentyl.
• DX-52-1 or its alkyl esters can be prepared in the following manner:
• non-ionic porous resin ion exchange resins, Sephadex, or adsorbing-desorbing carriers such as silica gel can be used.
• DX-52-1 may be recovered as a corresponding metal salt of carboxylic acid.
• Alkyl esters of DX-52-1 can be prepared by reaction of DX-52-1 with an ethereal solution of the corresponding diazo-lower alkane such as diazomethane and diazoethane in a lower alcohol such as methanol and ethanol or its mixture with water.
• DX-52-1 may exist in an undissociated form or as intramolecular salt, as shown by the following formula, depending upon the pH of a solvent.
• DC-52 and its alkyl ester may also exist in a hydrated form in an aqueous solution as shown by the following formula.
• Salts of compound (I) are exemplified by metallic salts of carboxylic acid such as sodium salt, potassium salt, calcium salt and magnesium salt, salts of carboxylic acid with organic bases such as triethylamine, lysine, ornithine and arginine, salts of tertiary amine with mineral acids such as hydrochloride and sulfate, and salts of tertiary amine with organic acids such as acetate, fumarate, maleate, succinate, lactate and malate.
• metallic salts of carboxylic acid such as sodium salt, potassium salt, calcium salt and magnesium salt
• organic bases such as triethylamine, lysine, ornithine and arginine
• salts of tertiary amine with mineral acids such as hydrochloride and sulfate
• salts of tertiary amine with organic acids such as acetate, fumarate, maleate, succinate, lactate and malate.
• a pharmaceutical composition comprising as active ingredient a compound (I) or a salt thereof in association with at least one pharmaceutically acceptable carrier or excipient.
• the carrier or excipient may take various forms depending upon the desired formulation.
• compound (I) or its salt may be dissolved in a physiological saline solution, or a solution of glucose, lactose or mannitol to formulate a pharmaceutical . composition suitable for injection.
• composition may, if desired, comprise conventional additives or excipients such as pharmaceutically acceptable salts which are well known in the pharmaceutical art.
• the composition can be administered to a human being in an amount of 0.1 to 2 mg/kg/day as a compound (I) though the dosage may vary depending upon age, condition, etc. of the patient.
• the administration may be effected, for example, by intravenous injection made continuously once a day, or intermittently once a week or once three weeks.
• Dosage forms suitable for oral administration may, for example, include tablets, powders, granules and ampoules which contain as additional components appropriate excipients, etc. well known in the pharmaceutical art. If desired, intraarterial administration, intraperitoneal administration, intrapleural administration, etc. is practicable.
• Acute toxicity (LD so ) of DX-52-1 by intraperitoneal administration in mice is 24.5 mg/kg.
• fraction A 161 mg is dissolved in 0.5 ml of an aqueous sodium bicarbonate solution, and the solution is passed through a column containing 9 ml of Diaion HP-20SS.
• the column is developed and eluted with water, and fraction Nos. 18-43, 1 ml each, are joined together, concentrated under reduced pressure, and freeze-dried to obtain 103 mg of light yellow sodium salt of DX-52-1.
• fraction B is likewise subjected to column chromatography of Diaion HP-20SS, and the column is developed and eluted with water.
• Fraction Nos. 13-16, 1 ml each, are joined together, concentrated under reduced pressure and freeze-dried to obtain 83 mg of light yellow sodium salt of DX-52-1.
• Spots of DX ⁇ 52 ⁇ 1 after the development can be detected by bioassay using Bacillus subtilis, spray of hot sulfuric acid or iodine, nitroprusside reaction, ninhydrin reaction, Ehrlich's reagent, Dragendroff reaction, or ultraviolet absorption.
• IR spectrum (cm -1 ): 3350, 1738, 1592, 1473, 1267, 1139, 1072, 1057.
• DC-52 methyl ester is dissolved in ether or a small amount of methanol, and a dry ethereal solution saturated with hydrogen chloride gas is added to the solution, whereby DC-52 methyl ester hydrochloride is formed as colorless powders.
• the precipitate is recovered by filtration with suction, and thoroughly washed with ether to obtain 180 mg of DC-52 methyl ester hydrochloride as a single product.
• mice having a weight of about 22 g were used for each group as test animals; and 1 x 10 6 cells of Lymphocytic leukemia P-388 tumor were implanted and intraperitoneally in the test animals. Twenty-four hours after implantation, 0.2 ml of physiological saline solution containing the test compound in various concentrations was administered intraperitoneally. T/C% after implantation and optimum dosage are given in Table 1.
• DX-52-1 and DC-52 were dissolved respectively in acetonitrile: phosphate buffer (pH 7.0) (1:4) and incubated at 25°C for 6 hours. Amount of each compound remaining was determined with area intensity at 271 nm by high performance liquid chromatography.
• An injection is prepared by added distilled water to 5 g of DX-52-1 and 50 g of glucose to make 1 I of a solution.
• the solution is filtered under pressure (0.5 Kg/cm 2 ) using a membrane filter having a 0.22 ⁇ pore size (Millipore Company, FGLD 14200) and N 2 gas. Portions of the filtrate are then poured into 20 ml-white ampoules and sealed under standard practices.

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• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Health & Medical Sciences (AREA)
• General Health & Medical Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Medicinal Chemistry (AREA)
• Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
• Pharmacology & Pharmacy (AREA)
• Veterinary Medicine (AREA)
• Animal Behavior & Ethology (AREA)
• Public Health (AREA)
• Communicable Diseases (AREA)
• Oncology (AREA)
• Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
• Nitrogen Condensed Heterocyclic Rings (AREA)
• Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)

Applications Claiming Priority (2)

Publications (3)

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ID=13811976

Family Applications (1)

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• 1983
  • 1983-05-13 JP JP58083775A patent/JPS59210086A/ja active Granted
• 1984
  • 1984-05-04 US US06/606,902 patent/US4650869A/en not_active Expired - Lifetime
  • 1984-05-11 EP EP84105338A patent/EP0128370B1/en not_active Expired
  • 1984-05-11 DE DE8484105338T patent/DE3465595D1/de not_active Expired

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